Copy animated viewport color to another object
You can do this by either copying the keyframes themselves or by sharing Action data in an NLA strip. Using NLAs means that changes made to the shared Action on one object will also be reflected in the behaviour of the other object.

Method 1, Duplicate Keyframes:

Select only the Viewport Color keyframes from your source object in the Dope Sheet.

CTRL+C to &quot;Copy&quot;.

Notice that the Transform keyframes/channels are not selected.

Add a single dummy keyframe to Viewport Color on your destination object.

Select only the Viewport Color keyframes from your destination object in the Dope Sheet.

CTRL+V to &quot;Copy&quot;.


Delete the dummy keyframes if they're still there.


Method 2, Shared Actions:

Place the keyframes for Viewport Color specially in their own Action datablock, and then push that Action onto an NLA track for both of the objects:


You can now add another NLA track or active action to keyframe the other properties of either object.